This DDR2 memory module meets the needs of high data transmission performance for game players. High memory frequency up to 800MHz creates a super high speed data transmission. Furthermore, 4GB RAM makes sure a stable and smooth game playing experience. Features: 4GB RAM - Large memory up to 4GB RAM ensures the stability and smoothness of data transmission. 800MHz Frequency - 800MHz frequency makes data transmission super fast. Gives a great gaming experience. Designed for AMD. 240PIN - Adopting 240PIN to achieve high anti-interference and antistatic properties. Plug and Play - Supports plug and play. No driver required. Instruction:The memory module is divided into SD, DDR, DDR2, DDR3 models. Please check the following list to know what memory module has been installed in your computer, and what memory module you need to buy. If you don't know which memory module is suitable for your computer, please use the software test to see what memory module your favorite computer needs. (Download a CPU-Z software and decompress it), after running the software, look at the "Maximum Bandwidth" column of the "SPD" option, you will see "PCxx00", as follows: (Memory module DDR, DDR2, and DDR3 are not common to each other, and the sockets are also different, and you can't force to insert it in, so as not to damage the memory module and the motherboard, remember!)PC2100 is DDR 266 memory module PC2700 is DDR 333 memory module PC3200 is DDR 400 memory module PC4200 is DDR2 533 memory module PC4300 is DDR2 533 memory module PC5300 is DDR2 667 memory module PC6400 is DDR2 800 memory module PC8500 is DDR3 1066 memory module PC10700 is DDR3 1333 memory module PC12800 is DDR3 1600 memory module Specifications: Product type: 4GB 800MHz DDR2 Memory: 4GB PIN: 240PIN Frequency: 800MHz Suitable: For desktop computer Suitable: For AMD Voltage: 1.8V Bandwidth: PC2-6400 Package size: approx. 15 * 6 * 1 cm/ 5.9 * 2.4 * 0.4 in Package weight: 26g/ 0.9oz Package List: 1 * 4GB 800MHz DDR2 Ways: If the Memory Appears: Blue Screen, Crash, Restart, Long Alarm Sound, Please Operate as follows, if not, it is determined to be incompatible: 1. The memory is not inserted properly, or the connecting finger is oxidized. Use the eraser to erase the memory connecting finger and then reinsert it, or change the slot; 2. The memory slot is dusty or oxidized. Use a brush and wash water to clean it (If you don't wash the water, just brush it off) 3. The memory is not compatible, try another memory. 4. CMOS is not discharged to restore the factory settings, maybe it is normal (the motherboard battery can be removed, and then installed again). 5. The motherboard is not compatible with the CPU, try another CPU Note: The product can only be used for AMD motherboards and does not support for Intel processors. If the motherboard is equipped with DDR2 interface and the CPU is suitable for AMD, this product is compatible with your device. But if the motherboard is too old, and the motherboard does not support 4G memory, this product is not suitable for your device. .